Abstract
Meiotic configuration at microsporogenesis was examined in several wild tetraploid and hexaploid taxa of tuber-bearing Solanum. A high frequency of bivalents was observed in all of the species studied: four tetraploid and one hexaploid taxa in Series Conicibaccata, one tetraploid taxon in Series Piurana, a Mexican tetraploid species in Series Longipedicellata, and three hexaploid taxa in Series Demissa. An outlook on evolutionary significance of the cytologically disomic behavior in the polyploid taxa of the tuber-bearing Solanum was presented. Further, a genetic efficiency in introgression was discussed for an efficient genetic manipulation with these valuable, but under-utilized polyploid genetic resources.
